The add-on is the server, which is why there is nothing to configure.

Most Blender bridges ask you to run a separate process and keep it alive alongside Blender; here enabling the extension opens the endpoint, and the client just connects. That also fixes the scope: it works while Blender is open on your machine, and the connection is a local SSE port rather than anything remote.

What it is

A Blender add-on that also speaks MCP. It highlights topology issues directly in the viewport and exposes the scene to ChatGPT, Claude or Gemini for improvement suggestions. The server lives inside the add-on, so there is nothing else to install or keep running.

What you get

Automatic n-gon highlighting, so topology issues show up as you model rather than at export time
AI comments on the mesh from ChatGPT, Claude or Gemini
Zero external MCP server — enabling the add-on is the whole setup
An SSE endpoint at http://localhost:13180/sse that any MCP client can attach to
Asset Store integration is listed as planned, not implemented

Requirements

Blender 4.2+. Install through Blender itself: Edit → Preferences → Get Extensions → Repositories → Add Remote Repository, using https://xhiroga.github.io/blender-mcp-senpai/extensions/index.json, then search for Blender Senpai, install it and enable it under Add-ons. For Claude, Cline or Roo Code, bridge to the SSE endpoint with npx -y supergateway --sse http://localhost:13180/sse; Dive connects to that URL directly. Restart the app after configuring — on Windows, end the process from Task Manager. Licensed GPL-3.0.

Setup effort

Add the configuration to your client

See installation options

USE CASES

01

Catching bad topology while you model

N-gons are highlighted in the viewport instead of surfacing later as shading artefacts.

02

Getting a second opinion on a mesh

Ask an assistant what to improve, with the scene already in view.

03

Connecting a client that only speaks stdio

Bridge to the local SSE endpoint through supergateway rather than changing the add-on.

INSTALLATION

Connect your client

MCP Clients

Claude Desktop, Cline, Roo Code

JSON

{
  "mcpServers": {
    "blender-senpai": {
      "command": "npx",
      "args": [
        "-y",
        "supergateway",
        "--sse",
        "http://localhost:13180/sse"
      ]
    }
  }
}

Dive

DIVE · JSON

{
  "mcpServers": {
    "blender-senpai": {
      "transport": "sse",
      "enabled": true,
      "command": null,
      "args": [],
      "env": {},
      "url": "http://localhost:13180/sse"
    }
  }
}

Blender MCP Senpai